如何将参数传递给Django的PasswordChangeForm的__init__函数

Question

我在尝试访问Django中的PasswordChangeView时遇到TypeError。错误是：

Django Version: 1.7.3 
Exception Type: TypeError 
Exception Value:  
__init__() missing 1 required positional argument: 'user' 
Exception Location: /usr/local/lib/python3.4/dist-packages/django/views/generic/edit.py in get_form, line 45 
Python Executable: /usr/bin/python3.4 

我一直没能找到FormView控件的例子从https://docs.djangoproject.com/en/1.7/_modules/django/contrib/auth/forms/#PasswordChangeForm

加载提供PasswordChangeForm这是我想做到这一点，但我仍然在运行到错误即使经过一些调整。

urls.py

url(r'^password/change/$', login_required(views.PasswordChangeView.as_view()), name='change_password'), 

views.py

class PasswordChangeView(FormView): 
    template_name = 'change_password.html' 
    form_class = PasswordChangeForm 

    def dispatch(self, request, *args, **kwargs): 
     try: 
      self.initial['user'] = self.request.user 
     except AttributeError: 
      raise Http404 

     return super(PasswordChangeView, self).dispatch(request, *args, **kwargs) 

我不能肯定为什么我仍然得到这个错误。如果我看看，我和FormView控件延长FormMixin我看到以下内容：

def get_form(self, form_class): 
    """ 
    Returns an instance of the form to be used in this view. 
    """ 
    return form_class(**self.get_form_kwargs()) 

def get_form_kwargs(self): 
    """ 
    Returns the keyword arguments for instantiating the form. 
    """ 
    kwargs = { 
     'initial': self.get_initial(), 
     'prefix': self.get_prefix(), 
    } 

    if self.request.method in ('POST', 'PUT'): 
     kwargs.update({ 
      'data': self.request.POST, 
      'files': self.request.FILES, 
     }) 
    return kwargs 

和...

def get_initial(self): 
    """ 
    Returns the initial data to use for forms on this view. 
    """ 
    return self.initial.copy() 

来源：https://github.com/django/django/blob/master/django/views/generic/edit.py

我证实，self.initial包含用户通过调用self.get_form_kwargs（）：

{'initial': {'user': <SimpleLazyObject: <User: maaack>>}, 'prefix': None} 

我还该怎么样o将用户转到表单中？

Answer 1

您应该将用户作为第一个参数传递给窗体构造函数。看看SetPasswordForm.__init__()：

def get_form(self, form_class): 
    return form_class(self.request.user, **self.get_form_kwargs()) 

有一个在PasswordChangeForm没有user字段，以便在initial的user关键是没用的。